Send invoices by email.

app/Http/Controllers/PdfController.php

@@ -9,10 +9,29 @@ use Illuminate\Http\Response;
 
 class PdfController extends Controller
 {
+    /**
+     * Return an invoice as download for the specified resource.
+     */
     public function downloadInvoice(int $invoice_id): Response
+    {
+        return $this->buildInvoicePdf($invoice_id)->stream();
+    }
+
+    /**
+     * Return a rendered pdf invoice as string to build an email attachment from it for the specified resource.
+     */
+    public function attachInvoice(int $invoice_id): string
+    {
+        return $this->buildInvoicePdf($invoice_id)->output();
+    }
+
+    /**
+     * Render the pdf view for the given invoice.
+     */
+    protected function buildInvoicePdf(int $invoice_id): \Barryvdh\DomPDF\PDF
     {
         $invoice = Invoice::find($invoice_id);
 
-        return Pdf::loadView('pdfs.invoice', ['invoice' => $invoice->load(['address', 'delivery']), 'options' => Option::optionsAsObject()])->stream();
+        return Pdf::loadView('pdfs.invoice', ['invoice' => $invoice->load(['address', 'delivery']), 'options' => Option::optionsAsObject()]);
     }
 }